EP0617168B1 - Dosing element for coating moving webs, especially paper or cardboard - Google Patents
Dosing element for coating moving webs, especially paper or cardboard Download PDFInfo
- Publication number
- EP0617168B1 EP0617168B1 EP94102627A EP94102627A EP0617168B1 EP 0617168 B1 EP0617168 B1 EP 0617168B1 EP 94102627 A EP94102627 A EP 94102627A EP 94102627 A EP94102627 A EP 94102627A EP 0617168 B1 EP0617168 B1 EP 0617168B1
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- European Patent Office
- Prior art keywords
- roller
- counter
- knife
- pressure hose
- bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000011248 coating agent Substances 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 239000011111 cardboard Substances 0.000 title claims 2
- 239000011087 paperboard Substances 0.000 title claims 2
- 239000000463 material Substances 0.000 claims abstract description 15
- 230000001154 acute effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
- B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
- B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
- B05C11/044—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for holding the blades
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
Definitions
- the invention relates to a metering device according to the preamble of claim 1.
- a metering device is known from DE-C-28 51 015.
- Figure 1 the pressure tube pressing the doctor rod is arranged inside the doctor bed.
- the doctor bed is mounted in a sliding guide of the doctor bed holder.
- this requires a relatively high level of effort, both in terms of construction and material.
- the object of the invention is to address a metering device in such a way that a transition between the doctor blade rod and doctor blade is possible in a simple manner, without modification, in particular if a profiled strip and the doctor blade are to be provided with a press hose for pressing the doctor blade.
- the pressure hose for the doctor rod or the doctor bed in the profile strip, which also carries the tip part at one end for pressing on the doctor blade. This results in an offset line of force between the force of the profile bar, which on the tip part on the Scraper blade acts and the force of the pressure hose, which acts on the doctor bed or on the doctor rod.
- An angle between these two directions of force is particularly favorable, the line of action of the pressure tube preferably passing exactly through the central axis of the doctor rod and deviating only slightly from the radial of the counter roller passing through the line of contact of the doctor rod with the counter roller.
- the metering device can preferably be arranged in one of the lower quadrants of the counter roll.
- FIGS. 1-7 each representing variants in principle in a side view, only doctor blade and press hose and possibly - if illustrated - the profile adjustment device of the coating blade, then including profile strip, are shown in section.
- a coating device or dosing device is sketched in principle as a whole system.
- the web of material is guided in the cutout of the metering device or counter roller shown by the counter roller W along the doctor bed 11 which holds the doctor rod 2, which is designed here as a doctor blade rod, and already carries the coating composition.
- the doctor bed is fixed in a holder or clamp 18, 18 'by means of a slide 17 via a leaf spring 16 holding it.
- the doctor bed is pressed by means of pressure hose 13 in the direction of the counter roll W, which is held in an extension 14 'of the profile bar 14.
- the profile bar 14 is in turn slidably mounted in a guide 19.
- the movement of the web or the counter roller W is indicated by the arrow p, the movement of the profile strip by the double arrow u and the movement of the slide 17 by the double arrow v.
- the direction of force of the pressure hose 13 extends obliquely to the direction of force of the profile strip including its tip part 15 - which is given by the double arrow u.
- the tube force is aligned here so that it runs through the center line of the doctor blade rod 2 and deviates only slightly from the radial line drawn on the counter roller W in the line of contact of the doctor blade rod 2.
- the metering device is preferably pivoted by means of the support arms 71 of the doctor bar 72, which carries the metering device with a swivel radius of at least 500 mm and by means of hydraulic lifting mechanisms 73 (see FIG. 6).
- the tip part 25 of the profile strip 24 is arranged at a greater distance from the clamping 28 at 28 'and 34 than the pressure hose 23, which in turn is here in an extension 24 'the profile bar 24 is held.
- the rod holder 21 consists of the doctor bed 22 and the plate-shaped holding part 26 formed integrally therewith. This holding part is offset or cranked with respect to the rear wall 37 of the doctor bed, insofar as it is present in the area of the doctor rod 2. It is offset by at least its own wall thickness so that the tip part 25 of the profile strip 24 does not abut the doctor bed.
- the angular assignment of the force lines of the press hose 23 and the profile strip 24 or their tip part 25 is given, as in the case of FIG. 1.
- a sliding guide 29 is provided for the profile strip 24.
- the doctor bed is fixed here via a clamping lug 34, its holding plate 26 and a further pressure hose 30.
- the adjustment device for the profile strip 24 is indicated here with the screw 31 and can be designed similarly to US Pat. No. 2,695,004.
- the arrangement according to FIG. 4 also essentially shows the doctor bed design 41 corresponding to FIG. 3, here with the clamping at 48 and 48 '.
- the pressure hose 43 for the doctor rod 2 is held in the doctor bed 42. It is pressed on via an extension part 44 'of the profiled strip 44 which has the tip part 45 for the coating blade 5.
- the coating blade 5 is indicated here, as in FIG. 3, by the dash-dotted line at 5.
- the offset of the holding plate 46 of the doctor bed is dimensioned sufficiently large so that the front edge of the tip part 45 does not touch the doctor bed.
- Figure 5 shows the similar again and usual parts like the other figures, in particular the doctor bed 51 according to FIG. 1 with the leaf spring 56 holding it in the clamping 58 and 58 'via pressure hose 57.
- the leaf spring is clamped in an extension 52 of the doctor bed, which is by means of the extension 60 of the Profile bar 54 held pressure hose 53 is pressed against the web.
- the guide for the profile part 54 having the tip part 55 for the coating blade 5 is designated 59.
- the solution chosen here is to make the leaf spring 56 holding the doctor bed quite short, so that the tip part 55 of the profile strip 54 is further away from the clamping 58, 58 'than that Pressure hose 53 and the doctor bed is arranged. This results in a very favorable position of the coating blade 5 on the web pressing profile strip 54 and its tip part 55.
- the adjustment of the profile strip is similar to that already explained in FIG. 3. However, this is only one embodiment, for example, but it can also be used in the other figures.
- FIG. 1 An arrangement for the so-called bent-blade driving style is shown in FIG. This allows the advantages that both the pressure hose and the profile strip have to be complemented.
- the profile bar has the advantage of a better or more precise cross-profile control, while the pressure hose is relatively insensitive to errors in the paper and an uneven ink supply.
- the main advantage of this arrangement is, however, that the contact pressure can initially be applied in its basic setting by the relatively rigid profile strip 61, while by means of the hose pressure uninfluenced by other, restricting parameters, the final pressing of the blade can be achieved uniformly over the web width or roller length. Overall, this results in a relatively simple, not very complex construction, which is suitable for retrofitting older systems.
- the arrangement is such that the extension 6 4 of the pressure or profile strip 61 holding the pressure hose 63 is provided in the area of the same which is distant from the clamping area 66 of the coating blade 66 provided with the pressure hose 67.
- the center plane M of the pressing force of the pressure hose 63 can either run in the direction of a radial plane of the counter-roller W or parallel to such a center plane R at a short distance of at most 8 mm.
- the distribution of the contact forces between the profile strip 61 and the pressure hose 63 can take place approximately in a ratio of 2: 1 in order to have a sufficiently large control range for the contact pressure of the pressure hose 63, but of course there can also be considerable deviations from this.
Landscapes
- Coating Apparatus (AREA)
- Paper (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
Abstract
Description
Die Erfindung betrifft eine Dosiereinrichtung entsprechend dem Oberbegriff des Patentanspruchs 1. Eine solche Einrichtung ist bekannt aus DE-C-28 51 015. Bei dieser Einrichtung ist insbesondere (Figur 1) vorgesehen, daß der den Rakelstab anpressende Preßschlauch innerhalb des Rakelbetts angeordnet ist. Auf diese Weise bleibt bei einem Wechsel bzw. Übergang von einem von einem Rakelbett gehaltenen Rakelstab zu einer Streichklinge die Profilierungsmöglichkeit durch die Profilleiste (Kammleiste) erhalten. Hierbei ist es aber notwendig, daß das Rakelbett in einer Schiebeführung der Rakelbetthalterung gelagert ist. Dies erfordert natürlich einen relativ hohen Aufwand, sowohl hinsichtlich der konstruktiven als auch der werkstoffmäßigen Seite. In anderen Fällen ist es nötig, bei dem Übergang von einem Rakelstab zu einer Streichklinge größere Umbauarbeiten vorzunehmen.The invention relates to a metering device according to the preamble of claim 1. Such a device is known from DE-C-28 51 015. In this device it is provided in particular (Figure 1) that the pressure tube pressing the doctor rod is arranged inside the doctor bed. In this way, the possibility of profiling through the profile strip (comb strip) is retained when changing or transitioning from a doctor rod held by a doctor bed to a doctor blade. Here, however, it is necessary that the doctor bed is mounted in a sliding guide of the doctor bed holder. Of course, this requires a relatively high level of effort, both in terms of construction and material. In other cases, it is necessary to carry out major renovations when changing from a doctor blade to a doctor blade.
Die Aufgabe der Erfindung ist es nun, eine Dosiereinrichtung derart anzugehen, daß ohne Umbauarbeiten auf einfache Weise ein Übergang zwischen Rollrakelstab und Streichklinge möglich ist, insbesondere wenn für die Anpressung der Streichklinge eine Profilleiste und der Rollrakel ein Preßschlauch vorgesehen sein soll.The object of the invention is to address a metering device in such a way that a transition between the doctor blade rod and doctor blade is possible in a simple manner, without modification, in particular if a profiled strip and the doctor blade are to be provided with a press hose for pressing the doctor blade.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.This object is achieved by the features of the characterizing part of patent claim 1.
Besonders vorteilhaft ist es, den Anpreßschlauch für Rakelstab bzw. das Rakelbett in der Profilleiste unterzubringen, die auch den Spitzenteil an ihrem einen Ende zum Anpressen der Streichklinge trägt. Dabei ergibt sich eine versetzte Kraftangriffslinie zwischen der Kraft der Profilleiste, die über deren Spitzenteil auf die Streichklinge wirkt und die Kraft des Anpreßschlauchs, der auf das Rakelbett bzw. auf den Rakelstab wirkt. Besonders günstig ist dabei ein Winkel zwischen diesen beiden Kraftrichtungen, wobei die Wirkungslinie des Anpreßschlauchs vorzugsweise genau durch die zentrale Achse des Rakelstabes geht und nur geringfügig von der durch die Anliegelinie des Rakelstabes an der Gegenwalze gehende Radiale der Gegenwalze abweicht.It is particularly advantageous to accommodate the pressure hose for the doctor rod or the doctor bed in the profile strip, which also carries the tip part at one end for pressing on the doctor blade. This results in an offset line of force between the force of the profile bar, which on the tip part on the Scraper blade acts and the force of the pressure hose, which acts on the doctor bed or on the doctor rod. An angle between these two directions of force is particularly favorable, the line of action of the pressure tube preferably passing exactly through the central axis of the doctor rod and deviating only slightly from the radial of the counter roller passing through the line of contact of the doctor rod with the counter roller.
Günstig ist es auch, die Kraftrichtung von der Profilleiste einschließlich deren Spitzenteil in einem Winkel zur im Schnittpunkt dieser Kraftlinie mit dem Walzenmantel gezogenen Tangente zwischen 55 und 65° auszubilden. Dabei kann man vorzugsweise die Dosiereinrichtung in einem der unteren Quadranten der Gegenwalze anordnen.It is also favorable to form the direction of force from the profile strip including its tip part at an angle to the tangent between 55 and 65 ° drawn at the intersection of this line of force with the roller shell. The metering device can preferably be arranged in one of the lower quadrants of the counter roll.
Nachfolgend wird die Erfindung anhand der in den Figuren 1-7 dargestellten Ausführungsbeispiele erläutert, wobei Fig. 1-6 jeweils Varianten prinzipmäßig in Seitenansicht darstellen, wobei nur Rakelstab und Preßschlauch und evtl. - sofern dargestellt - die Profilverstelleinrichtung der Streichklinge, dann einschließlich Profilleiste, im Schnitt dargestellt sind. In Fig. 7 ist eine Streicheinrichtung bzw. Dosiereinrichtung als Gesamtanlage prinzipiell skizziert.The invention is explained below on the basis of the exemplary embodiments shown in FIGS. 1-7, FIGS. 1-6 each representing variants in principle in a side view, only doctor blade and press hose and possibly - if illustrated - the profile adjustment device of the coating blade, then including profile strip, are shown in section. In Fig. 7, a coating device or dosing device is sketched in principle as a whole system.
In Figur 1 wird die nicht dargestellte Warenbahn in dem dargestellten Ausschnitt der Dosiereinrichtung bzw. Gegenwalze von der Gegenwalze W an dem den hier als Rollrakelstab ausgebildeten Rakelstab 2 haltenden Rakelbett 11 entlanggeführt, wobei sie die Beschichtungsmasse schon trägt. Das Rakelbett wird in einer Halterung bzw. Einspannung 18, 18' mittels einem Schieber 17 über eine es haltende Blattfeder 16 festgelegt. Das Rakelbett wird mittels Druckschlauch 13 in Richtung auf die Gegenwalze W gepreßt, der in einem Fortsatz 14' der Profilleiste 14 gehalten ist. Die Profilleiste 14 wiederum ist verschieblich in einer Führung 19 gelagert. Die Bewegung der Bahn bzw. der Gegenwalze W ist durch den Pfeil p, die Bewegung der Profilleiste durch den Doppelpfeil u und die Bewegung des Schiebers 17 durch den Doppelpfeil v angedeutet. Man erkennt, daß die Kraftrichtung des Anpreßschlauches 13 schräg zur Kraftrichtung der Profilleiste einschließlich deren Spitzenteil 15 - die gegeben ist durch den Doppelpfeil u - verläuft. Die Schlauchkraft ist hier so ausgerichtet, daß sie durch die Mittellinie des Rollrakelstabes 2 verläuft und nur geringfügig von der in der Anliegelinie des Rollrakelstabes 2 an der Gegenwalze W gezogenen Radiale derselben abweicht.In FIG. 1, the web of material, not shown, is guided in the cutout of the metering device or counter roller shown by the counter roller W along the
In Figur 2 ist prinzipiell die gleiche Dosieranordnung, jetzt aber mit Streichklinge 4 anstelle des Rakelbetts und Rakelstabes dargestellt. Es sind keinerlei Änderungen nötig gewesen, um diese Variation zu erzielen. Der Druckschlauch ist nunmehr drucklos, und der Spitzenteil 15 der Profilleiste 14 preßt die Streichklinge an die Gegenwalze W. Hierbei ist es erforderlich, daß die gesamte Dosiereinrichtung um eine zu den vollständig in Figuren 1 und 2 dargestellten Teilen einschließlich der Einspannung bei 17 und 18' und zur Gegenwalze W parallele Achse schwenkbar ausgebildet ist, um die Streichklingenkante an die Warenbahn anlegen zu können. Hierbei ist ein Abstand zwischen der Vorderkante des Spitzenteils 15 und der Blattfeder 16 vorgesehen, damit ein Anstoßen des Teils 15 an der Blattfeder verhindert und ein einwandfreies Arbeiten des Rollrakelstabes gewährleistet ist.In Figure 2, the same metering arrangement is shown in principle, but now with a doctor blade 4 instead of the doctor bed and doctor rod. No changes were necessary to achieve this variation. The pressure hose is now depressurized, and the
Vorzugsweise erfolgt die Verschwenkung der Dosiereinrichtung mittels der Tragarme 71 des Rakelbalkens 72, der die Dosiereinrichtung trägt mit einem Schwenkradius von mindestens 500 mm und mittels hydraulischer Hubwerke 73 (siehe Fig. 6).The metering device is preferably pivoted by means of the
Die Anordnung nach Figur 3 ist recht ähnlich, jedoch ist hier im Unterschied zur Figur 1 der Spitzenteil 25 der Profilleiste 24 in einem größeren Abstand von der Einspannung 28 bei 28' und 34 angeordnet, als der Anpreßschlauch 23, der hier wiederum in einem Fortsatz 24' der Profilleiste 24 gehalten ist. In diesem Fall besteht die Stabhalterung 21 aus dem Rakelbett 22 und dem einstückig damit ausgebildeten, plattenförmigen Halteteil 26. Dieses Halteteil ist in Bezug auf die Rückwand 37 des Rakelbetts, soweit sie im Bereich des Rakelstabes 2 vorhanden ist, versetzt, bzw. abgekröpft ausgebildet. Sie ist um mindestens die eigene Wandstärke versetzt, damit der Spitzenteil 25 der Profilleiste 24 nicht am Rakelbett anstößt. Auch hier ist die winkelmäßige Zuordnung der Kraftlinien von Preßschlauch 23 und Profilleiste 24 bzw. deren Spitzenteil 25 wie im Fall von Figur 1 gegeben. Auch hier ist eine Gleitführung 29 für die Profilleiste 24 vorgesehen. Die Festlegung des Rakelbetts erfolgt hier über eine Klemmnase 34, seine Halteplatte 26 und einen weiteren Druckschlauch 30. Die Verstelleinrichtung für die Profilleiste 24 ist hier mit der Schraube 31 angedeutet und kann ähnlich wie in US-A 2 695 004 ausgeführt sein.The arrangement according to FIG. 3 is quite similar, but here, in contrast to FIG. 1, the
Die Anordnung nach Figur 4 zeigt auch im wesentlichen wieder die Rakelbettausbildung 41 entsprechend Figur 3, hier mit der Einspannung bei 48 und 48'. In diesem Fall ist der Anpreßschlauch 43 für den Rakelstab 2 in dem Rakelbett 42 gehalten. Er wird angepreßt über ein Fortsatzteil 44' der das Spitzenteil 45 für die Streichklinge 5 aufweisenden Profilleiste 44. Die Streichklinge 5 ist hier, wie auch in Figur 3, durch die strichpunktierte Linie bei 5 angedeutet. Der Versatz der Halteplatte 46 des Rakelbetts ist ebenso wie in Figur 3 ausreichend groß bemessen, damit die Vorderkante des Spitzenteils 45 nicht das Rakelbett berührt.The arrangement according to FIG. 4 also essentially shows the
Die Ausführungsform nach Figur 5 zeigt wieder die ähnlichen und üblichen Teile wie die anderen Figuren, insbesondere das Rakelbett 51 nach Figur 1 mit der dieses in der Einspannung 58 und 58' über Druckschlauch 57 haltenden Blattfeder 56. Dabei ist die Blattfeder in einem Fortsatz 52 des Rakelbetts eingespannt, das mittels im Fortsatz 60 der Profilleiste 54 gehaltenen Anpreßschlauch 53 an die Bahn angepreßt wird. Die Führung für die den Spitzenteil 55 für die Streichklinge 5 aufweisende Profilleiste 54 ist mit 59 bezeichnet.The embodiment of Figure 5 shows the similar again and usual parts like the other figures, in particular the
Da man bei der Gestaltung der Halterung des Rakelbetts große Freiheit hat, hat man hier die Lösung gewählt, die das Rakelbett haltende Blattfeder 56 recht kurz zu machen, so daß das Spitzenteil 55 der Profilleiste 54 weiter entfernt von der Einspannung 58, 58' als der Anpreßschlauch 53 und das Rakelbett angeordnet ist. Man erreicht dadurch eine sehr günstige Lage von der Streichklinge 5 an die Warenbahn anpressende Profilleiste 54 und deren Spitzenteil 55. Die Verstellung der Profilleiste ist ähnlich wie bereits zu Figur 3 erläutert. Diese ist aber nur eine, beispielsweise Ausführungsform, die aber auch bei den übrigen Figuren angewendet werden kann.Since there is great freedom in the design of the holder of the doctor bed, the solution chosen here is to make the
Waren die bisherigen Anordnungen (Figur 1-5) für die Fahrweise mit der sogenannten starren Klinge konzipiert, ist in Figur 6 eine Anordnung für die sogenannte Bent-Blade-Fahrweise dargestellt. Hierdurch kann man die Vorteile, die sowohl der Druckschlauch als auch die Profilleiste haben, sich ergänzen lassen. Die Profilleiste hat ja den Vorteil einer besseren bzw. genaueren Querprofilsteuerung, während der Druckschlauch relativ unempfindlich gegen Fehler im Papier und eine ungleichmäßige Farbzuführung ist.If the previous arrangements (FIGS. 1-5) were designed for the driving style with the so-called rigid blade, an arrangement for the so-called bent-blade driving style is shown in FIG. This allows the advantages that both the pressure hose and the profile strip have to be complemented. The profile bar has the advantage of a better or more precise cross-profile control, while the pressure hose is relatively insensitive to errors in the paper and an uneven ink supply.
Der Hauptvorteil dieser Anordnung besteht jedoch darin, daß die Anpreßkraft zunächst in ihrer Grundeinstellung durch die relativ starre Profilleiste 61 aufgebracht werden kann, während mittels des Schlauchdrucks unbeeinflußt von sonstigen, einschränkenden Parametem die endgültige Anpressung der Klinge gleichmäßig über die Bahnbreite bzw. Walzenlänge erreicht werden kann. Insgesamt ergibt sich eine relativ einfache, nicht sehr aufwendige Konstruktion, die sich für eine Umrüstung älterer Anlagen eignet.The main advantage of this arrangement is, however, that the contact pressure can initially be applied in its basic setting by the relatively
Die Anordnung ist dabei so getroffen, daß der den Druckschlauch 63 haltende Fortsatz 6 4 der Druck- bzw. Profilleiste 61 in dem vom mit Druckschlauch 67 versehenen Einspannbereich der Streichklinge 66 entfernten Bereich desselben vorgesehen ist. Die Mittelebene M der Preßkraft des Druckschlauches 63 kann dabei entweder in Richtung einer radialen Ebene der Gegenwalze W verlaufen oder aber parallel zu einer solchen Mittelebene R in einem geringen Abstand von höchstens 8 mm. Es besteht vorzugsweise ein Winkel zwischen der Mittelebene M der Preßkraft des Druckschlauchs 63 und der Einspannebene L der Streichklinge 66 zwischen 45 und 55°.The arrangement is such that the extension 6 4 of the pressure or
Die Aufteilung der Anpreßkräfte zwischen Profilleiste 61 und Druckschlauch 63 kann etwa im Verhältnis 2:1 erfolgen, um einen genügend großen Regelbereich für den Anpreßdruck des Druckschlauchs 63 zu haben, jedoch kann hiervon natürlich auch in erheblichem Maße abgewichen werden.The distribution of the contact forces between the
Durch die erfindungsgemäßen Anordnungen wird auf einfache Weise, ohne daß Umbauarbeiten in spürbarem Maße nötig sind, erreicht, daß sowohl mit einer Streichklinge als auch mit einer in einem Rakelbett geführten Rollrakel gearbeitet werden kann, wobei in letzterem Fall ein Abstand zwischen der der Papierbahn bzw. Gegenwalze zugewandten Fläche des Halteteils 16, 26, 46 oder 56 des Rakelbetts und einer zu dieser parallelen, die Rollrakel in ihrem der Papierbahn oder der Gegenwalze näheren Bereich tangierenden Ebene im allgemeinen mindestens 45 mm beträgt.With the arrangements according to the invention, it is achieved in a simple manner, without conversion work being necessary to a noticeable extent, that work can be carried out both with a doctor blade and with a roller doctor guided in a doctor bed, in the latter case a distance between the paper web or Counter-roll facing surface of the
Claims (14)
- Apportioning device for coating continuous lengths of material, in particular paper or cardboard, with a coating substance, with the following features:(a) the holder (18,18'; 28,28'; 48,48'; 58,58') for a knife bed (11, 21, 41, 51) or a spreading blade (4, 5) is always the same;(b) the roller knife (2), which is carried by the knife bed, is pressed by a pressure hose (13, 23, 43, 53) against a counter-roller (W) or a length of material which is guided by it;(c) the spreading blade is pressed on at least substantially by a tip portion (15, 25, 45, 55) of a profile ledge (14, 24, 44, 54), which extends transversely to the counter-roller (W) or length of material and which is sectionally adjustable transversely to the length of material or counter-roller (W) which are associated with their own adjusting devices (31, 32, 33),characterised by the following features:(d) the profile ledge (14, 24, 44, 54) is provided exclusively for pressing on the spreading blade; and(e) the profile ledge (14, 24, 44, 54) is offset relative to the pressure hose (13, 23, 43, 53) which serves to press on the knife bed in such a manner that the planes through the engagement lines of the press-on loads for the knife bed on the one hand and the spreading blade on the other hand are offset relative to each other in the direction transversely to the counter-roller (W) or the length of material or extend at an acute angle to each other.
- Device according to Claim 1, characterised in that the pressure hose (13, 23, 43, 53) is held in the profile ledge (14, 24, 54) or in a continuation of its holder (14', 24', 64) which is at a distance of at least 5 mm from the press-on edge to be applied to the spreading blade, as seen in the direction of the guide elements (19, 29, 59) of the apportioning device for the profile ledge (14, 24, 54).
- Device according to Claim 1 or 2, characterised in that a holding plate (26, 46), which is integrated with the knife bed (22, 42), is provided which is, relative to the back of the knife bed facing away from the counter-roller or the length of material if present or given in the area of the roller knife bar (2) or as of the pressure-load line of the profile ledge in the direction of the holding plate (26, 46), offset from the knife bed (22, 42) by at least its wall thickness in order to exclude contact of the tip portion (25, 45) of the profile ledge (24, 44) with the knife bed.
- Device according to one of Claims 1 - 3, characterised in that the effective line of the press-on load of the pressure hose (13, 23) is arranged transversely to the pressure-load line of the profile ledge including its tip portion (15, 25) and through the centre line of the roller knife (2) and preferably at an angle between 80 and 95° relative to its tangential plane extending through the abutment line of the roller knife (2) on the counter-roller (W).
- Device according to Claim 4, characterised in that the extension (14', 24'), which carries the pressure hose (13, 23), of the profile ledge (14, 24) is arranged at a greater distance from the clamping of knife bed or spreading blade than the tip portion (15) of the profile ledge (14) in case a leaf spring (16) serves to hold the knife bed (11), and at a shorter distance from the clamping than the tip portion (25) of the profile ledge (24) in case a holding plate (26) is provided which is integrated with the knife bed (22).
- Device according to one of Claims 1 - 3, characterised in that the pressure hose (43) for the knife bed (42) is held therein.
- Device according to one of Claims 1 - 6, characterised in that the holder (18,18'; 28,28'; 48,48') which comprises the clamping for the spreading blade (4) or the holder for the knife bed (16, 26, 46), is arranged in such a manner that the angle between holding part (16, 26, 46) of the knife bed or the spreading blade (4) in its unclamped, unbent state and the tangential plane drawn in the abutment line of the roller knife (2) against the counter-roller (W) or length of material in the provided pivotal position of the apportioning device for operation with the roller blade is between 25 and 35°.
- Device according to one of Claims 1 - 7, characterised in that the apportioning device is arranged in one of the bottom squares of the counter-roller (W).
- Device according to one of Claims 1 - 8, characterised in that the apportioning device is arranged to be pivotal around an axis which runs parallel to the counter-roller (W) and is distanced from the latter and the knife bed (11, 22, 51).
- Device according to Claim 9, characterised in that the pivotal radius is at least 500 mm.
- Device according to one of Claims 1 - 10, characterised in that for operation with rigid spreading blade its press-on pressure is generated solely by the profile ledge (14, 24, 54).
- Device, in particular according to one of Claims 1 - 10, characterised in that for so-called bent-blade operation a considerable portion of press-on pressure of the spreading blade is generated by a pressure hose (63) which is arranged at a holder extension (64) of the profile ledge (61) remote from the clamping area of the spreading blade (66).
- Device according to Claim 12, characterised in that the effective load plane (M) of the pressure hose (63) extends, with only a small deviation of maximum 3° in the direction of a radial plane through the counter-roller or parallel to such a centre plane (R) at a distance of maximum 8 mm.
- Device according to Claim 12 or 13, characterised in that the pressure hose (63) offers between 25 and 35% of the total press-on load of the spreading blade (66) for the purpose of regulating its press-on force against the lengths or counter-roller (W).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4309002 | 1993-03-20 | ||
| DE4309002A DE4309002A1 (en) | 1993-03-20 | 1993-03-20 | Dosing device for coating running webs, preferably made of paper or cardboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0617168A1 EP0617168A1 (en) | 1994-09-28 |
| EP0617168B1 true EP0617168B1 (en) | 1997-01-29 |
Family
ID=6483349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94102627A Expired - Lifetime EP0617168B1 (en) | 1993-03-20 | 1994-02-22 | Dosing element for coating moving webs, especially paper or cardboard |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5433781A (en) |
| EP (1) | EP0617168B1 (en) |
| JP (1) | JPH0747323A (en) |
| AT (1) | ATE148515T1 (en) |
| CA (1) | CA2119431A1 (en) |
| DE (2) | DE4309002A1 (en) |
| FI (1) | FI108003B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19508178A1 (en) * | 1995-03-09 | 1996-09-12 | Draiswerke Gmbh | Process and plant for treating coating color when applied to a paper web |
| DE29510486U1 (en) * | 1995-06-30 | 1995-08-17 | Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim | Squeegee assembly |
| US5665163A (en) * | 1995-08-22 | 1997-09-09 | Beloit Technologies, Inc. | Film applicator with entrained air removal and surface control |
| DE29609053U1 (en) * | 1996-05-20 | 1996-08-22 | Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim | Device for the direct or indirect application or final metering of a liquid or pasty medium onto a running material web |
| DE29611186U1 (en) * | 1996-06-26 | 1996-09-05 | Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim | Doctor blade holder |
| DE19626580A1 (en) * | 1996-07-02 | 1998-01-08 | Jagenberg Papiertech Gmbh | Metering rod system for a coater for web products such as paper |
| DE19652289A1 (en) | 1996-12-16 | 1998-06-18 | Voith Sulzer Papiermasch Gmbh | Web coating applicator |
| DE19734262A1 (en) * | 1997-08-07 | 1999-02-11 | Voith Sulzer Papiermasch Gmbh | Process for the direct or indirect application of a liquid or pasty medium to a running material web, in particular made of paper or cardboard |
| DE19755411A1 (en) * | 1997-12-12 | 1999-06-17 | Voith Sulzer Papiertech Patent | Doctor device |
| US6019846A (en) * | 1997-12-16 | 2000-02-01 | Voith Sulzer Paper Technology North America, Inc. | Coater rod bed |
| DE19843733A1 (en) * | 1998-09-24 | 2000-03-30 | Voith Sulzer Papiertech Patent | Wiper blade assembly coating paper or card bands with optionally-viscous liquid, employs system of leaf spring tensioning which forms ductor chamber and is readily replaced and adjusted |
| US5968269A (en) * | 1998-10-21 | 1999-10-19 | Voith Sulzer Paper Technology Noth America, Inc. | Coater with multi-part and multi-use profile bar assembly |
| DE102004024079A1 (en) * | 2004-05-14 | 2005-12-08 | Voith Paper Patent Gmbh | doctor bed |
| DE102004029565A1 (en) * | 2004-06-18 | 2006-01-05 | Voith Paper Patent Gmbh | doctor device |
| DE102004040622A1 (en) * | 2004-08-21 | 2006-02-23 | Voith Paper Patent Gmbh | doctor device |
| DE102005020848A1 (en) * | 2005-05-02 | 2006-11-09 | Voith Patent Gmbh | doctor bed |
| DE102005029613A1 (en) * | 2005-06-23 | 2007-01-04 | Voith Patent Gmbh | Device for metering and / or leveling |
| US20070214984A1 (en) * | 2006-03-20 | 2007-09-20 | Alfano James P | Rod holder device |
| US20070237552A1 (en) * | 2006-04-06 | 2007-10-11 | Mcalpine Robert W | Doctor Blade and Developer Assembly with Precision Diameter Radius for Improved Doctoring Consistency |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE434396A (en) * | 1938-06-10 | |||
| US2695004A (en) * | 1951-03-02 | 1954-11-23 | Champion Paper & Fibre Co | Doctor blade for coating machines |
| US3143438A (en) * | 1960-07-26 | 1964-08-04 | West Virginia Pulp & Paper Co | Apparatus for coating web material |
| US3559572A (en) * | 1969-05-14 | 1971-02-02 | Us Plywood Champ Papers Inc | Method of inking a printing roll using a metering roll and revolving doctor rod |
| DE2851015C2 (en) * | 1978-11-24 | 1982-07-08 | Jagenberg-Werke AG, 4000 Düsseldorf | Device for regulating the application thickness when coating moving material webs |
| US4405661A (en) * | 1981-09-10 | 1983-09-20 | Beloit Corporation | Blade type fountain coater and method |
| US4452833A (en) * | 1982-02-08 | 1984-06-05 | Consolidated Papers, Inc. | Paper coating method |
| DE3311081A1 (en) * | 1983-03-26 | 1984-09-27 | J.M. Voith Gmbh, 7920 Heidenheim | Squeegee holder |
| FI73266C (en) * | 1984-06-29 | 1987-09-10 | Waertsilae Oy Ab | Rod scraper for paper coating device. |
| AT396437B (en) * | 1986-10-25 | 1993-09-27 | Voith Gmbh J M | PRE-DOSING DEVICE IN A COATING PLANT |
| FI85897C (en) * | 1990-04-19 | 1992-06-10 | Valmet Paper Machinery Inc | Procedure for limiting coating width when coating applications or cardboard and device intended for carrying out the process |
| US5238511A (en) * | 1992-02-04 | 1993-08-24 | Everts En Van Der Weyden Exploitatiemaatschappij | Double C-shaped clamp |
| DE4217528C2 (en) * | 1992-05-27 | 1996-05-30 | Voith Gmbh J M | Coating device for running webs |
-
1993
- 1993-03-20 DE DE4309002A patent/DE4309002A1/en not_active Withdrawn
-
1994
- 1994-02-22 DE DE59401675T patent/DE59401675D1/en not_active Expired - Fee Related
- 1994-02-22 AT AT94102627T patent/ATE148515T1/en not_active IP Right Cessation
- 1994-02-22 EP EP94102627A patent/EP0617168B1/en not_active Expired - Lifetime
- 1994-03-14 US US08/213,118 patent/US5433781A/en not_active Expired - Fee Related
- 1994-03-18 CA CA002119431A patent/CA2119431A1/en not_active Abandoned
- 1994-03-18 JP JP6049187A patent/JPH0747323A/en active Pending
- 1994-03-18 FI FI941293A patent/FI108003B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI941293A0 (en) | 1994-03-18 |
| DE4309002A1 (en) | 1994-09-22 |
| JPH0747323A (en) | 1995-02-21 |
| FI108003B (en) | 2001-11-15 |
| EP0617168A1 (en) | 1994-09-28 |
| ATE148515T1 (en) | 1997-02-15 |
| US5433781A (en) | 1995-07-18 |
| CA2119431A1 (en) | 1994-09-21 |
| FI941293A7 (en) | 1994-09-21 |
| DE59401675D1 (en) | 1997-03-13 |
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